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Sample repository: https://github.com/martinbonnin/TestLintLocale

The `test` string is available in the default values/strings.xml (en) but not in values-en-rGB/strings.xml and that still shows a warning. I was assuming that would work given that locale="en" was specified in the default strings.xml

When you hover over the string it will give a suggestion/reason .Please expand the suggestion/reason and follow accordingly to resolve the issue.
Please let us know if you still face the issue.

Thanks for your answer!
Have you look the Sample Repository ?

Actually the suggestion/reason should not appear in Android Studio: this is the bug

Yes I have looked into the sample .Lint in Android Studio gives reasons and suggestions which will help developer to fix issues.

The thing is that there is no issue to fix. The string is not translated to 'en-rGB' and this is fine because there is a fallback in the default strings.xml.

This is working fine from the command line. But Android Studio shows a warning (which should not be there)

Please create a donottranslate.xml which is default location for all non translated strings.

donottranslate.xml has nothing to do with this. The strings should be translated. It's just about fallbacks for non-defined regional translations. For a example:

values/strings.xml:
<string name="color">Color</string>
<string name="shape">Shape</string>

values-en-rGB/strings.xml:
<string name="color">Colour</string>

values-fr/strings.xml:
<string name="color">Couleur</string>
<string name="shape">Forme</string>

In GB, british people will use "Colour", with a "u" so we need the values-en-rGB resources to override the default "Color" from the default US language.
Now we don't need a specific GB translation for "Shape" as it's the same word in GB and US english but Android Studio will still show the warning. This is what this ticket is about.
Note that we can't add any of these keys to "donottranslate.xml" as we need to translate in French in all cases.

Can you please reopen the issue ?

As per Android guidelines, if an application has more than one locale, then all the Strings declared in one language should be translated in all other languages.

Hi,
It seems you don't understand our problem, and the regional and lint tricks.
Could you please reopen the issue and transfer the ticket management to someone who knows about Android Studio, and understand what we are talking about ?

Thank you very much

Thank you for your feedback. Team may reach out for more feedback in reproducing or triaging this issue.

To give more details, this behaviour is documented in `lint --show` (see below). It's working when using gradle to invoke lint but not in the IDE:

MissingTranslation
------------------
Summary: Incomplete translation

[skip]
By default this detector allows regions of a language to just provide a subset
of the strings and fall back to the standard language strings. You can require
all regions to provide a full translation by setting the environment variable
ANDROID_LINT_COMPLETE_REGIONS.

You can tell lint (and other tools) which language is the default language in
your res/values/ folder by specifying tools:locale="languageCode" for the root
<resources> element in your resource file. (The tools prefix refers to the
namespace declaration http://schemas.android.com/tools.)

https://issuetracker.google.com/146359815 is a probable duplicate of this one.

warning: string 'ads_hide_ad_title' has no default translation.
warning: string 'archive_notify_new_messages_global_setting_title' has no default translation.
warning: string 'archive_notify_new_messages_info' has no default translation.
warning: string 'archive_notify_new_messages_title' has no default translation.
warning: string 'delete_media' has no default translation.
warning: string 'ephemeral_unblock_to_update_setting' has no default translation.
warning: string 'fingerprint_locked_title' has no default translation.
warning: string 'fingerprint_setup_dialog_negative_button' has no default translation.
warning: string 'fingerprint_setup_dialog_positive_button' has no default translation.
warning: string 'fingerprint_timeout_immediately' has no default translation.
warning: string 'gallery' has no default translation.
warning: string 'mediamods' has no default translation.
warning: string 'message_qr_found_title' has no default translation.
warning: string 'msg_autoreply_specialtimes' has no default translation.
warning: string 'msg_autoreply_spectoignore' has no default translation.
warning: string 'msg_autoreply_spectoreply' has no default translation.
warning: string 'network_usage_ask_reset_message' has no default translation.
warning: string 'not_expiring_message' has no default translation.
warning: string 'notification_settings_title_archived_chats' has no default translation.
warning: string 'others_device_login_chat_message' has no default translation.
warning: string 'others_device_logout_chat_message' has no default translation.
warning: string 'others_multiple_device_change_chat_message' has no default translation.
warning: string 'passv' has no default translation.
warning: string 'picture_in_picture_error' has no default translation.
warning: string 'read_later_chats_setting_title' has no default translation.
warning: string 'read_later_mute_details_header' has no default translation.
warning: string 'restart_phone' has no default translation.
warning: string 'room_attachment' has no default translation.
warning: string 'room_create' has no default translation.
warning: string 'room_installed_error' has no default translation.
warning: string 'rooms_continue_in_messenger' has no default translation.
warning: string 'rooms_create_link_in_messenger_continue' has no default translation.
warning: string 'rooms_create_link_in_messenger_nux' has no default translation.
warning: string 'rooms_non_e2e_warning' has no default translation.
warning: string 'rooms_nux_title' has no default translation.
warning: string 'sched_title_activity_edit' has no default translation.
warning: string 'search_section_results' has no default translation.
warning: string 'search_themes' has no default translation.
warning: string 'seen_status_color' has no default translation.
warning: string 'seen_status_color_sum' has no default translation.
warning: string 'self_device_login_chat_message' has no default translation.
warning: string 'self_device_login_group_chat_message' has no default translation.
warning: string 'self_device_login_list_chat_message' has no default translation.
warning: string 'self_device_logout_chat_message' has no default translation.
warning: string 'self_device_logout_group_chat_message' has no default translation.
warning: string 'self_device_logout_list_chat_message' has no default translation.
warning: string 'self_multiple_device_change_chat_message' has no default translation.
warning: string 'self_multiple_device_change_group_chat_message' has no default translation.
warning: string 'self_multiple_device_change_list_chat_message' has no default translation.
warning: string 'sending_to' has no default translation.
warning: string 'settings_notification_ignore_archived_chats' has no default translation.
warning: string 'settings_notification_ignore_archived_chats_detail' has no default translation.
warning: string 'settings_privacy_fingerprint_timeout' has no default translation.
warning: string 'storage_usage' has no default translation.
warning: string 'storage_usage_delete_complete_text' has no default translation.
warning: string 'storage_usage_free' has no default translation.
warning: string 'storage_usage_used' has no default translation.
warning: string 'tb_msg_more_info' has no default translation.
warning: string 'unseen_status_color' has no default translation.
warning: string 'unseen_status_color_sum' has no default translation.
warning: string 'voip_e2ee_message' has no default translation.
warning: string 'wallpaper_packge' has no default translation.
warning: string 'welcome_available_platforms_consumer' has no default translation.
warning: string 'welcome_available_platforms_india_consumer' has no default translation.
warning: string 'welcome_available_platforms_india_smb' has no default translation.
warning: string 'welcome_available_platforms_smb' has no default translation.
/data/user/0/com.gmail.heagoo.apkeditor.pro/files/decoded/res/layout/date_divider_header.xml:3: error: Error parsing XML: junk after document element