Explanation for issues of type "MissingTranslation":
   If an application has more than one locale, then all the strings declared
   in one language should also be translated in all other languages.
   If the string should not be translated, you can add the attribute
   translatable="false" on the <string> element, or you can define all your
   non-translatable strings in a resource file called donottranslate.xml. Or,
   you can ignore the issue with a tools:ignore="MissingTranslation"
   attribute.
   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.)

在預設的strings.xml的開始設定

<resources xmlns:tools="http://schemas.android.com/tools"
 xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2"
 tools:ignore="MissingTranslation">