locale_translation_clear_cache_projects() Clears the projects cache. File
locale_translation_source_build($project, $langcode, $filename = NULL) Builds abstract translation source.
Comparison result of source files timestamps. Timestamp of source 1 is equal to the timestamp of source 2. See
_locale_translation_default_update_options() Returns default import options for translation update.
Common API for interface translation. File core/modules/locale/locale.translation.inc
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