As of Mp3tag v3.33-beta.5, these are the untranslated strings for the Danish translation of Mp3tag.
_C_MNU_EDIT_SELECT_SIMILAR Select similar files\tCtrl+G
_C_MNU_EDIT_SELECT_SIMILAR_NEXT Select next similar files\tCtrl+Shift+G
_C_MNU_SB_EDIT_SELECT_SIMILAR Select files similar to the currently selected file based on the active sort criteria {1}.
_C_MNU_SB_EDIT_SELECT_SIMILAR_NEXT Select next similar files that are different from the currently selected file based on the active sort criteria {1}.