diff --git a/app/src/main/res/values-cs-rCZ/strings.xml b/app/src/main/res/values-cs-rCZ/strings.xml
index 6ddc561d..19b9bb6e 100644
--- a/app/src/main/res/values-cs-rCZ/strings.xml
+++ b/app/src/main/res/values-cs-rCZ/strings.xml
@@ -159,6 +159,10 @@
     <string name="completed_lessons_topic">Téma</string>
     <string name="completed_lessons_absence">Nepřítomnost</string>
     <string name="completed_lessons_resources">Zdroje</string>
+    <!--Additional lessons-->
+    <string name="additional_lessons_title">Další lekce</string>
+    <string name="additional_lessons_button">Zobrazit další lekce</string>
+    <string name="additional_lessons_no_items">Žádné informace o dalších lekcích</string>
     <!--Attendance-->
     <string name="attendance_summary_button">Souhrn docházky</string>
     <string name="attendance_absence_school">Nepřítomen ze školních důvodů</string>
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index a16b18e5..06964458 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -145,6 +145,10 @@
     <string name="completed_lessons_topic">Thema</string>
     <string name="completed_lessons_absence">Abwesenheit</string>
     <string name="completed_lessons_resources">Ressourcen</string>
+    <!--Additional lessons-->
+    <string name="additional_lessons_title">Additional lessons</string>
+    <string name="additional_lessons_button">Show additional lessons</string>
+    <string name="additional_lessons_no_items">No info about additional lessons</string>
     <!--Attendance-->
     <string name="attendance_summary_button">Übersicht über die Schulbesuch</string>
     <string name="attendance_absence_school">Aus schulischen Gründen abwesend</string>
diff --git a/app/src/main/res/values-pl/strings.xml b/app/src/main/res/values-pl/strings.xml
index dc877eaf..14c93d1a 100644
--- a/app/src/main/res/values-pl/strings.xml
+++ b/app/src/main/res/values-pl/strings.xml
@@ -159,6 +159,10 @@
     <string name="completed_lessons_topic">Temat</string>
     <string name="completed_lessons_absence">Nieobecność</string>
     <string name="completed_lessons_resources">Zasoby</string>
+    <!--Additional lessons-->
+    <string name="additional_lessons_title">Dodatkowe lekcje</string>
+    <string name="additional_lessons_button">Pokaż dodatkowe lekcje</string>
+    <string name="additional_lessons_no_items">Brak informacji o dodatkowych lekcjach</string>
     <!--Attendance-->
     <string name="attendance_summary_button">Podsumowanie frekwencji</string>
     <string name="attendance_absence_school">Nieobecność z przyczyn szkolnych</string>
diff --git a/app/src/main/res/values-ru/strings.xml b/app/src/main/res/values-ru/strings.xml
index e2620b60..e17124d7 100644
--- a/app/src/main/res/values-ru/strings.xml
+++ b/app/src/main/res/values-ru/strings.xml
@@ -159,6 +159,10 @@
     <string name="completed_lessons_topic">Тема</string>
     <string name="completed_lessons_absence">Отсутствие</string>
     <string name="completed_lessons_resources">Ресурсы</string>
+    <!--Additional lessons-->
+    <string name="additional_lessons_title">Additional lessons</string>
+    <string name="additional_lessons_button">Show additional lessons</string>
+    <string name="additional_lessons_no_items">No info about additional lessons</string>
     <!--Attendance-->
     <string name="attendance_summary_button">Итоговая посещаемость</string>
     <string name="attendance_absence_school">Отсутствие по школьным причинам</string>
diff --git a/app/src/main/res/values-sk-rSK/preferences_values.xml b/app/src/main/res/values-sk-rSK/preferences_values.xml
new file mode 100644
index 00000000..d57e603b
--- /dev/null
+++ b/app/src/main/res/values-sk-rSK/preferences_values.xml
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <string-array name="app_theme_entries" tools:ignore="InconsistentArrays">
+        <item>Svetlý</item>
+        <item>Tmavý</item>
+        <item>Čierny (AMOLED)</item>
+    </string-array>
+    <string-array name="app_language_entries">
+        <item>Jazyk systému</item>
+        <item>Polski</item>
+        <item>English</item>
+        <item>Pусский</item>
+        <item>Українська</item>
+        <item>Deutsch</item>
+        <item>Čeština</item>
+    </string-array>
+    <string-array name="services_interval_entries">
+        <item>15 minút</item>
+        <item>30 minút</item>
+        <item>1 hodina</item>
+        <item>2 hodiny</item>
+        <item>6 hodín</item>
+        <item>12 hodín</item>
+        <item>24 hodín</item>
+    </string-array>
+    <string-array name="grade_modifier_entries">
+        <item>0,00</item>
+        <item>0,25</item>
+        <item>0,33</item>
+        <item>0,5</item>
+        <item>0,75</item>
+    </string-array>
+    <string-array name="grade_sorting_mode_entries">
+        <item>Abecedne</item>
+        <item>Podľa dátumu</item>
+    </string-array>
+    <string-array name="grade_color_scheme_entries">
+        <item>Dzienniczek+</item>
+        <item>Wulkanowy</item>
+        <item>Farby známok v denníku</item>
+    </string-array>
+    <string-array name="grade_average_mode_entries">
+        <item>Priemer známok až od druhého semestra</item>
+        <item>Priemer známok z oboch semestrov</item>
+        <item>Priemer známok z celého roka</item>
+    </string-array>
+    <string-array name="timetable_show_whole_class_entries">
+        <item>Neukaz</item>
+        <item>Zobrazit vše</item>
+        <item>Zobrazit menší</item>
+    </string-array>
+</resources>
diff --git a/app/src/main/res/values-sk-rSK/strings.xml b/app/src/main/res/values-sk-rSK/strings.xml
new file mode 100644
index 00000000..f5574c9b
--- /dev/null
+++ b/app/src/main/res/values-sk-rSK/strings.xml
@@ -0,0 +1,473 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!--Activity/Fragment title-->
+    <string name="login_title">Prihlásenie</string>
+    <string name="main_title">Wulkanowy</string>
+    <string name="grade_title">Známky</string>
+    <string name="attendance_title">Dochádzka</string>
+    <string name="exam_title">Skúšky</string>
+    <string name="timetable_title">Plán lekcie</string>
+    <string name="settings_title">Nastavenia</string>
+    <string name="more_title">Viac</string>
+    <string name="about_title">O aplikácii</string>
+    <string name="logviewer_title">Prehliadač protokolov</string>
+    <string name="contributors_title">Tvorcovia</string>
+    <string name="license_title">Licencie</string>
+    <string name="message_title">Správy</string>
+    <string name="send_message_title">Nová správa</string>
+    <string name="note_title">Poznámky a úspechy</string>
+    <string name="homework_title">Domáce úlohy</string>
+    <string name="account_title">Vyberte účet</string>
+    <!--Subtitles-->
+    <string name="grade_subtitle">Semester %1$d, %2$d/%3$d</string>
+    <!--Login-->
+    <string name="login_header_default">Prihláste sa pomocou študentského alebo rodičovského konta</string>
+    <string name="login_header_symbol">Zadajte symbol zo stránky denníka</string>
+    <string name="login_nickname_hint">Užívateľské meno</string>
+    <string name="login_email_hint">Email</string>
+    <string name="login_login_pesel_email_hint">Prihlásenie, číslo PESEL alebo e-mail</string>
+    <string name="login_password_hint">Heslo</string>
+    <string name="login_host_hint">Variácie denníka UONET+</string>
+    <string name="login_type_api">Mobile API</string>
+    <string name="login_type_scrapper">Scraper</string>
+    <string name="login_type_hybrid">Hybridné</string>
+    <string name="login_token_hint">Token</string>
+    <string name="login_pin_hint">PIN</string>
+    <string name="login_api_key_hint">Kľúč API</string>
+    <string name="login_symbol_hint">Symbol</string>
+    <string name="login_sign_in">Prihlásiť</string>
+    <string name="login_invalid_password">Toto heslo je príliš krátke</string>
+    <string name="login_incorrect_password">Prihlasovacie údaje sú nesprávne. Uistite sa, že je v poli nižšie vybraná správna variácie denníka UONET+</string>
+    <string name="login_invalid_pin">Neplatný PIN</string>
+    <string name="login_invalid_token">Neplatný token</string>
+    <string name="login_expired_token">Platnosť tokenu vypršala</string>
+    <string name="login_invalid_email">Neplatný e-mail</string>
+    <string name="login_invalid_login">Namiesto e-mailu použite priradené prihlasovacie údaje</string>
+    <string name="login_invalid_symbol">Neplatný symbol</string>
+    <string name="login_incorrect_symbol">Študent nebol nájdený. Skontrolujte správnosť symbolu a vybrané varianty denníka UONET+</string>
+    <string name="login_field_required">Toto pole je povinné</string>
+    <string name="login_duplicate_student">Vybraný študent je už prihlásený</string>
+    <string name="login_symbol_helper">The symbol can be found on the register page in&#160;<b>Uczeń</b> →&#160;<b>Dostęp Mobilny</b> →&#160;<b>Zarejestruj urządzenie mobilne</b>.\n\nMake sure that you have set the appropriate register variant in the <b>UONET+ register variant</b> field on the previous screen. Wulkanowy does not detect pre-school students at the moment</string>
+    <string name="login_select_student">Vyberte studenty, kteří se mají do aplikace přihlásit</string>
+    <string name="login_advanced">Iné možnosti</string>
+    <string name="login_advanced_warning_mobile_api">In this mode, a lucky number does not work, a class grade stats, summary of attendance, excuse for absence, completed lessons, school information and preview of the list of registered devices</string>
+    <string name="login_advanced_warning_scraper">This mode displays the same data as it appears on the register website</string>
+    <string name="login_advanced_warning_hybrid">The combination of the best features of the other two modes. It works faster than scraper and provides features not available in the Mobile API mode. It is in the experimental phase</string>
+    <string name="login_privacy_policy">Zásady ochrany osobných údajov</string>
+    <string name="login_contact_header">Problémy s prihlásením? Napíšte nám!</string>
+    <string name="login_contact_email">Email</string>
+    <string name="login_contact_discord">Discord</string>
+    <string name="login_email_intent_title">Poslať e-mail</string>
+    <string name="login_email_details">Opíšte podrobnosti problému:</string>
+    <string name="login_recover_warning">Uistite sa, že ste vybrali správny variant denníka UONET+!</string>
+    <string name="login_recover_button">Zabudol som heslo</string>
+    <string name="login_recover_title">Obnovte svoj účet</string>
+    <string name="login_recover">Obnoviť</string>
+    <string name="login_signed_in">Študent je už prihlásený</string>
+    <!--Main-->
+    <string name="main_account_picker">Manažér účtov</string>
+    <string name="main_log_in">Prihlásiť sa</string>
+    <string name="main_session_expired">Platnosť relácie vypršala</string>
+    <string name="main_session_relogin">Vaša relácia vypršala, prihláste sa prosím znovu</string>
+    <!--Grade-->
+    <string name="grade_header">Známka</string>
+    <string name="grade_semester">Semester %d</string>
+    <string name="grade_switch_semester">Zmeniť semester</string>
+    <string name="grade_no_items">Žiadne známky</string>
+    <string name="grade_weight">Váha</string>
+    <string name="grade_weight_value">Váha: %s</string>
+    <string name="grade_comment">Komentár</string>
+    <string name="grade_no_new_items">Žiadne nové známky</string>
+    <string name="grade_number_new_items">Number of new ratings: %1$d</string>
+    <string name="grade_average">Priemer: %1$.2f</string>
+    <string name="grade_points_sum">Body: %s</string>
+    <string name="grade_no_average">Bez priemeru</string>
+    <string name="grade_predicted">Predpovedané: %1$s</string>
+    <string name="grade_final">Konečná: %1$s</string>
+    <string name="grade_summary_points">Celkom bodov</string>
+    <string name="grade_summary_final_grade">Konečná známka</string>
+    <string name="grade_summary_predicted_grade">Predpokladaná známka</string>
+    <string name="grade_summary_calculated_average">Vypočítaný priemer</string>
+    <string name="grade_summary_final_average">Konečný priemer</string>
+    <string name="grade_menu_summary">Súhrn</string>
+    <string name="grade_menu_statistics">Trieda</string>
+    <string name="grade_menu_read">Označiť ako prečítané</string>
+    <string name="grade_statistics_partial">Čiastočne</string>
+    <string name="grade_statistics_semester">Semester</string>
+    <string name="grade_statistics_points">Body</string>
+    <plurals name="grade_number_item">
+        <item quantity="one">%d známka</item>
+        <item quantity="few">%d známky</item>
+        <item quantity="many">%d známok</item>
+        <item quantity="other">%d známok</item>
+    </plurals>
+    <plurals name="grade_new_items">
+        <item quantity="one">Nová známka</item>
+        <item quantity="few">Nové známky</item>
+        <item quantity="many">Nové známky</item>
+        <item quantity="other">Nové známky</item>
+    </plurals>
+    <plurals name="grade_new_items_predicted">
+        <item quantity="one">Nová predpokladaná známka</item>
+        <item quantity="few">Nové predpovedanej známky</item>
+        <item quantity="many">Nové predpovedanej známky</item>
+        <item quantity="other">Nové predpovedanej známky</item>
+    </plurals>
+    <plurals name="grade_new_items_final">
+        <item quantity="one">Nová konečná známka</item>
+        <item quantity="few">Nové konečnej známky</item>
+        <item quantity="many">Nové konečnej známky</item>
+        <item quantity="other">Nové konečnej známky</item>
+    </plurals>
+    <plurals name="grade_notify_new_items">
+        <item quantity="one">Máte %1$d novú známku</item>
+        <item quantity="few">Máte %1$d nové známky</item>
+        <item quantity="many">Máte %1$d nové známky</item>
+        <item quantity="other">Máte %1$d nové známky</item>
+    </plurals>
+    <plurals name="grade_notify_new_items_predicted">
+        <item quantity="one">Máte %1$d novú predpokladanú známku</item>
+        <item quantity="few">Máte %1$d nové predpokladané známky</item>
+        <item quantity="many">Máte %1$d nové predpokladané známky</item>
+        <item quantity="other">Máte %1$d nové predpokladané známky</item>
+    </plurals>
+    <plurals name="grade_notify_new_items_final">
+        <item quantity="one">Máte %1$d novú konečnú známku</item>
+        <item quantity="few">You received %1$d final grades</item>
+        <item quantity="many">You received %1$d final grades</item>
+        <item quantity="other">You received %1$d final grades</item>
+    </plurals>
+    <!--Timetable-->
+    <string name="timetable_lesson">Lekcia</string>
+    <string name="timetable_room">Room</string>
+    <string name="timetable_group">Skupina</string>
+    <string name="timetable_time">Hodiny</string>
+    <string name="timetable_changes">Zmeny</string>
+    <string name="timetable_no_items">Žiadne lekcie tento deň</string>
+    <string name="timetable_minutes">%s min</string>
+    <string name="timetable_seconds">%s sec</string>
+    <string name="timetable_time_left">%1$s left</string>
+    <string name="timetable_time_until">in %1$s</string>
+    <string name="timetable_finished">Lekcia skončila</string>
+    <string name="timetable_now">Now: %s</string>
+    <string name="timetable_next">Next: %s</string>
+    <string name="timetable_later">Later: %s</string>
+    <!--Completed lessons-->
+    <string name="completed_lessons_title">Completed lessons</string>
+    <string name="completed_lessons_button">Show completed lessons</string>
+    <string name="completed_lessons_no_items">No info about completed lessons</string>
+    <string name="completed_lessons_topic">Téma</string>
+    <string name="completed_lessons_absence">Neprítomnosť</string>
+    <string name="completed_lessons_resources">Resources</string>
+    <!--Additional lessons-->
+    <string name="additional_lessons_title">Additional lessons</string>
+    <string name="additional_lessons_button">Show additional lessons</string>
+    <string name="additional_lessons_no_items">No info about additional lessons</string>
+    <!--Attendance-->
+    <string name="attendance_summary_button">Attendance summary</string>
+    <string name="attendance_absence_school">Absent for school reasons</string>
+    <string name="attendance_absence_excused">Excused absence</string>
+    <string name="attendance_absence_unexcused">Unexcused absence</string>
+    <string name="attendance_exemption">Exemption</string>
+    <string name="attendance_excused_lateness">Excused lateness</string>
+    <string name="attendance_unexcused_lateness">Unexcused lateness</string>
+    <string name="attendance_present">Present</string>
+    <string name="attendance_deleted">Deleted</string>
+    <string name="attendance_unknown">Unknown</string>
+    <string name="attendance_number">Number of lesson</string>
+    <string name="attendance_no_items">No entries</string>
+    <plurals name="attendance_number_absences">
+        <item quantity="one">%1$d absence</item>
+        <item quantity="few">%1$d absences</item>
+        <item quantity="many">%1$d absences</item>
+        <item quantity="other">%1$d absences</item>
+    </plurals>
+    <string name="attendance_excuse_dialog_reason">Absence reason (optional)</string>
+    <string name="attendance_excuse_dialog_submit">Send</string>
+    <string name="attendance_excuse_success">Absence excused successfully!</string>
+    <string name="attendance_excuse_no_selection">You must select at least one absence!</string>
+    <string name="attendance_excuse_title">Excuse</string>
+    <!--Attendance summary-->
+    <string name="attendance_summary_final">Attendance</string>
+    <string name="attendance_summary_total">Total</string>
+    <!--Exam-->
+    <string name="exam_no_items">No exams this week</string>
+    <string name="exam_type">Type</string>
+    <string name="exam_entry_date">Entry date</string>
+    <!--Message-->
+    <string name="message_inbox">Inbox</string>
+    <string name="message_sent">Sent</string>
+    <string name="message_trash">Trash</string>
+    <string name="message_no_subject">(no subject)</string>
+    <string name="message_no_items">No messages</string>
+    <string name="message_preview_error">An error occurred while downloading message content</string>
+    <string name="message_from">From:</string>
+    <string name="message_to">To:</string>
+    <string name="message_date">Date: %s</string>
+    <string name="message_reply">Reply</string>
+    <string name="message_forward">Forward</string>
+    <string name="message_delete">Delete</string>
+    <string name="message_move_to_bin">Move to trash</string>
+    <string name="message_delete_forever">Delete permanently</string>
+    <string name="message_delete_success">Message deleted successfully</string>
+    <string name="message_share">Share</string>
+    <string name="message_print">Print</string>
+    <string name="message_subject">Subject</string>
+    <string name="message_content">Content</string>
+    <string name="message_send_successful">Message sent successfully</string>
+    <string name="message_required_recipients">You need to choose at least 1 recipient</string>
+    <string name="message_content_min_length">The message content must be at least 3 characters</string>
+    <plurals name="message_number_item">
+        <item quantity="one">%d message</item>
+        <item quantity="few">%d messages</item>
+        <item quantity="many">%d messages</item>
+        <item quantity="other">%d messages</item>
+    </plurals>
+    <plurals name="message_new_items">
+        <item quantity="one">New message</item>
+        <item quantity="few">New messages</item>
+        <item quantity="many">New messages</item>
+        <item quantity="other">New messages</item>
+    </plurals>
+    <plurals name="message_notify_new_items">
+        <item quantity="one">You received %1$d message</item>
+        <item quantity="few">You received %1$d messages</item>
+        <item quantity="many">You received %1$d messages</item>
+        <item quantity="other">You received %1$d messages</item>
+    </plurals>
+    <!--Note-->
+    <string name="note_no_items">No info about notes</string>
+    <string name="note_points">Points</string>
+    <plurals name="note_number_item">
+        <item quantity="one">%d note</item>
+        <item quantity="few">%d notes</item>
+        <item quantity="many">%d notes</item>
+        <item quantity="other">%d notes</item>
+    </plurals>
+    <plurals name="note_new_items">
+        <item quantity="one">New note</item>
+        <item quantity="few">New notes</item>
+        <item quantity="many">New notes</item>
+        <item quantity="other">New notes</item>
+    </plurals>
+    <plurals name="note_notify_new_items">
+        <item quantity="one">You received %1$d note</item>
+        <item quantity="few">You received %1$d notes</item>
+        <item quantity="many">You received %1$d notes</item>
+        <item quantity="other">You received %1$d notes</item>
+    </plurals>
+    <!--Praise-->
+    <plurals name="praise_number_item">
+        <item quantity="one">%d praise</item>
+        <item quantity="few">%d praises</item>
+        <item quantity="many">%d praises</item>
+        <item quantity="other">%d praises</item>
+    </plurals>
+    <plurals name="praise_new_items">
+        <item quantity="one">New praise</item>
+        <item quantity="few">New praises</item>
+        <item quantity="many">New praises</item>
+        <item quantity="other">New praises</item>
+    </plurals>
+    <plurals name="praise_notify_new_items">
+        <item quantity="one">You received %1$d praise</item>
+        <item quantity="few">You received %1$d praises</item>
+        <item quantity="many">You received %1$d praises</item>
+        <item quantity="other">You received %1$d praises</item>
+    </plurals>
+    <!--Neutral notes-->
+    <plurals name="neutral_note_number_item">
+        <item quantity="one">%d neutral note</item>
+        <item quantity="few">%d neutral notes</item>
+        <item quantity="many">%d neutral notes</item>
+        <item quantity="other">%d neutral notes</item>
+    </plurals>
+    <plurals name="neutral_note_new_items">
+        <item quantity="one">New neutral note</item>
+        <item quantity="few">New neutral notes</item>
+        <item quantity="many">New neutral notes</item>
+        <item quantity="other">New neutral notes</item>
+    </plurals>
+    <plurals name="neutral_note_notify_new_items">
+        <item quantity="one">You received %1$d neutral note</item>
+        <item quantity="few">You received %1$d neutral notes</item>
+        <item quantity="many">You received %1$d neutral notes</item>
+        <item quantity="other">You received %1$d neutral notes</item>
+    </plurals>
+    <!--Homework-->
+    <string name="homework_no_items">No info about homework</string>
+    <string name="homework_mark_as_done">Mark as done</string>
+    <string name="homework_mark_as_undone">Mark as undone</string>
+    <string name="homework_attachments">Attachments</string>
+    <!--Lucky number-->
+    <string name="lucky_number_title">Lucky number</string>
+    <string name="lucky_number_header">Today\'s lucky number is</string>
+    <string name="lucky_number_empty">No info about the lucky number</string>
+    <string name="lucky_number_notify_new_item_title">Lucky number for today</string>
+    <string name="lucky_number_notify_new_item">Today\'s lucky number is: %d</string>
+    <!--Mobile devices-->
+    <string name="mobile_devices_title">Mobile devices</string>
+    <string name="mobile_devices_no_items">No devices</string>
+    <string name="mobile_devices_unregister">Deregister</string>
+    <string name="mobile_device_removed">Device removed</string>
+    <string name="mobile_device_qr">QR code</string>
+    <string name="mobile_device_token">Token</string>
+    <string name="mobile_device_symbol">Symbol</string>
+    <string name="mobile_device_pin">PIN</string>
+    <!--School and teachers-->
+    <string name="schoolandteachers_title">School and teachers</string>
+    <!--School-->
+    <string name="school_title">School</string>
+    <string name="school_no_info">No info about school</string>
+    <string name="school_name">School name</string>
+    <string name="school_address">School address</string>
+    <string name="school_telephone">Telephone</string>
+    <string name="school_headmaster">Name of headmaster</string>
+    <string name="school_pedagogue">Name of pedagogue</string>
+    <string name="school_address_button">Show on map</string>
+    <string name="school_telephone_button">Call</string>
+    <!--Teacher-->
+    <string name="teachers_title">Teachers</string>
+    <string name="teacher_no_items">No info about teachers</string>
+    <string name="teacher_no_subject">No subject</string>
+    <!--Conference-->
+    <string name="conferences_title">Conferences</string>
+    <string name="conference_no_items">No info about conferences</string>
+    <!--Account-->
+    <string name="account_add_new">Add account</string>
+    <string name="account_logout">Logout</string>
+    <string name="account_confirm">Do you want to log out of an active student?</string>
+    <string name="account_logout_student">Student logout</string>
+    <string name="account_type_student">Student account</string>
+    <string name="account_type_parent">Parent account</string>
+    <string name="account_login_mobile_api">Mobile API mode</string>
+    <string name="account_login_hybrid">Hybrid mode</string>
+    <!--About-->
+    <string name="about_version">App version</string>
+    <string name="about_contributor">Contributors</string>
+    <string name="about_contributor_summary">List of Wulkanowy developers</string>
+    <string name="about_feedback">Report a bug</string>
+    <string name="about_feedback_summary">Send a bug report via e-mail</string>
+    <string name="about_faq">FAQ</string>
+    <string name="about_faq_summary">Read Frequently Asked Questions</string>
+    <string name="about_discord">Discord server</string>
+    <string name="about_discord_summary">Join the Wulkanowy community</string>
+    <string name="about_facebook">Facebook fanpage</string>
+    <string name="about_facebook_summary">Like our facebook fanpage</string>
+    <string name="about_privacy">Privacy policy</string>
+    <string name="about_privacy_summary">Rules for collecting personal data</string>
+    <string name="about_homepage">Homepage</string>
+    <string name="about_homepage_summary">Visit the website and help develop the application</string>
+    <string name="about_licenses">Licenses</string>
+    <string name="about_licenses_summary">Licenses of libraries used in the application</string>
+    <!--Licenses-->
+    <string name="license_dialog_title">License</string>
+    <!--Contributor-->
+    <string name="contributor_avatar_description">Avatar</string>
+    <string name="contributor_see_more">See more on GitHub</string>
+    <!--Log viewer-->
+    <string name="logviewer_share">Share logs</string>
+    <string name="logviewer_refresh">Refresh</string>
+    <!--Error dialog-->
+    <string name="dialog_error_check_update">Check for updates</string>
+    <string name="dialog_error_check_update_message">Before reporting a bug, check first if an update with the bug fix is available</string>
+    <!--Generic-->
+    <string name="all_content">Content</string>
+    <string name="all_retry">Retry</string>
+    <string name="all_description">Description</string>
+    <string name="all_no_description">No description</string>
+    <string name="all_teacher">Teacher</string>
+    <string name="all_date">Date</string>
+    <string name="all_entry_date">Entry date</string>
+    <string name="all_color">Color</string>
+    <string name="all_details">Details</string>
+    <string name="all_category">Category</string>
+    <string name="all_close">Close</string>
+    <string name="all_no_data">No data</string>
+    <string name="all_subject">Subject</string>
+    <string name="all_prev">Prev</string>
+    <string name="all_next">Next</string>
+    <string name="all_search">Search</string>
+    <string name="all_search_hint">Search…</string>
+    <!--Timetable Widget-->
+    <string name="widget_timetable_no_items">No lessons</string>
+    <string name="widget_timetable_theme_title">Choose theme</string>
+    <string name="widget_timetable_theme_light">Light</string>
+    <string name="widget_timetable_theme_dark">Dark</string>
+    <string name="widget_timetable_theme_system">System Theme</string>
+    <!--Preferences-->
+    <string name="pref_view_header">Appearance</string>
+    <string name="pref_view_list">Default view</string>
+    <string name="pref_view_grade_average_mode">Calculation of the end-of-year average</string>
+    <string name="pref_view_grade_average_force_calc">Force average calculation by app</string>
+    <string name="pref_view_present">Show presence in attendance</string>
+    <string name="pref_view_app_theme">Application theme</string>
+    <string name="pref_view_expand_grade">Expand grades</string>
+    <string name="pref_view_timetable_show_timers">Mark current lesson in timetable</string>
+    <string name="pref_view_timetable_show_groups">Show groups next to subjects in timetable</string>
+    <string name="pref_view_grade_statistics_list">Show chart list in class grades</string>
+    <string name="pref_view_timetable_show_whole_class">Show whole class lessons</string>
+    <string name="pref_view_subjects_without_grades">Show subjects without grades in Grades</string>
+    <string name="pref_view_grade_color_scheme">Grades color scheme</string>
+    <string name="pref_view_grade_sorting_mode">Subjects sorting in \"Grades\"</string>
+    <string name="pref_view_app_language">App language</string>
+    <string name="pref_notify_header">Notifications</string>
+    <string name="pref_notify_switch">Show notifications</string>
+    <string name="pref_notify_upcoming_lessons_switch">Show upcoming lesson notifications</string>
+    <string name="pref_notify_fix_sync_issues">Fix synchronization &amp; notifications issues</string>
+    <string name="pref_notify_fix_sync_issues_message">Your device may have data synchronization issues and with notifications.\n\nTo fix them, you need to add Wulkanowy to the autostart and turn off battery optimization/saving in the phone settings.</string>
+    <string name="pref_notify_fix_sync_issues_settings_button">Go to settings</string>
+    <string name="pref_notify_debug_switch">Show debug notifications</string>
+    <string name="pref_services_header">Synchronization</string>
+    <string name="pref_services_switch">Automatic update</string>
+    <string name="pref_services_suspended">Suspended on holidays</string>
+    <string name="pref_services_interval">Updates interval</string>
+    <string name="pref_services_wifi">Wi-Fi only</string>
+    <string name="pref_services_force_sync">Sync now</string>
+    <string name="pref_services_message_sync_success">Synced!</string>
+    <string name="pref_services_message_sync_failed">Sync failed</string>
+    <string name="pref_services_sync_in_progress">Sync in progress</string>
+    <string name="pref_services_dialog_force_sync_title">Synchronization</string>
+    <string name="pref_services_dialog_force_sync_summary">        Manual sync doesn\'t refresh app views.
+        \nTo see the synced data relaunch the app after syncing.
+    </string>
+    <string name="pref_other_header">Other</string>
+    <string name="pref_other_grade_modifier_plus">Value of the plus</string>
+    <string name="pref_other_grade_modifier_minus">Value of the minus</string>
+    <string name="pref_other_fill_message_content">Reply with message history</string>
+    <!--Notification Channels-->
+    <string name="channel_new_entries">New entries in register</string>
+    <string name="channel_new_grades">New grades</string>
+    <string name="channel_lucky_number">Lucky number</string>
+    <string name="channel_new_message">New messages</string>
+    <string name="channel_new_notes">New notes</string>
+    <string name="channel_push">Push notifications</string>
+    <string name="channel_upcoming_lessons">Upcoming lessons</string>
+    <string name="channel_debug">Debug</string>
+    <!--Colors-->
+    <string name="all_black">Black</string>
+    <string name="all_red">Red</string>
+    <string name="all_blue">Blue</string>
+    <string name="all_green">Green</string>
+    <string name="all_purple">Purple</string>
+    <string name="all_empty_color">No color</string>
+    <!--Others-->
+    <string name="all_copied">Copied</string>
+    <string name="all_undo">Undo</string>
+    <!--Update helper-->
+    <string name="update_download_started">Download of updates has started…</string>
+    <string name="update_download_success">An update has just been downloaded.</string>
+    <string name="update_download_success_button">Restart</string>
+    <string name="update_failed">Update failed! Wulkanowy may not function properly. Consider updating</string>
+    <!--Errors-->
+    <string name="error_no_internet">No internet connection</string>
+    <string name="error_timeout">Connection to register failed. Servers can be overloaded. Please try again later</string>
+    <string name="error_login_failed">Loading data failed. Please try again later</string>
+    <string name="error_password_change_required">Register password change required</string>
+    <string name="error_service_unavailable">Maintenance underway UONET + register. Try again later</string>
+    <string name="error_unknown_uonet">Unknown UONET + register error. Try again later</string>
+    <string name="error_unknown_app">Unknown application error. Please try again later</string>
+    <string name="error_unknown">An unexpected error occurred</string>
+    <string name="error_feature_disabled">Feature disabled by your school</string>
+    <string name="error_feature_not_available">Feature not available. Login in a mode other than Mobile API</string>
+</resources>
diff --git a/app/src/main/res/values-uk/strings.xml b/app/src/main/res/values-uk/strings.xml
index cc26b24f..a911405f 100644
--- a/app/src/main/res/values-uk/strings.xml
+++ b/app/src/main/res/values-uk/strings.xml
@@ -159,6 +159,10 @@
     <string name="completed_lessons_topic">Тема</string>
     <string name="completed_lessons_absence">Відсутність</string>
     <string name="completed_lessons_resources">Ресурси</string>
+    <!--Additional lessons-->
+    <string name="additional_lessons_title">Additional lessons</string>
+    <string name="additional_lessons_button">Show additional lessons</string>
+    <string name="additional_lessons_no_items">No info about additional lessons</string>
     <!--Attendance-->
     <string name="attendance_summary_button">Підсумок відвідуваності</string>
     <string name="attendance_absence_school">Відсутність зі шкільних причин</string>