12 files declare their use of TranslatableInterface in Drupal 8

BulkForm.php in core/modules/views/src/Plugin/views/field/BulkForm.php

ContentModerationState.php in core/modules/content_moderation/src/Entity/ContentModerationState.php

DeleteMultipleForm.php in core/lib/Drupal/Core/Entity/Form/DeleteMultipleForm.php

EntityContentBase.php in core/modules/migrate/src/Plugin/migrate/destination/EntityContentBase.php

EntityConverter.php in core/lib/Drupal/Core/ParamConverter/EntityConverter.php

EntityReferenceFormatterBase.php in core/lib/Drupal/Core/Field/Plugin/Field/FieldFormatter/EntityReferenceFormatterBase.php

EntityRepository.php in core/lib/Drupal/Core/Entity/EntityRepository.php

EntityTranslationRenderTrait.php in core/modules/views/src/Entity/Render/EntityTranslationRenderTrait.php

EntityViewBuilder.php in core/lib/Drupal/Core/Entity/EntityViewBuilder.php

EntityViewDisplay.php in core/lib/Drupal/Core/Entity/Entity/EntityViewDisplay.php

ModerationInformation.php in core/modules/content_moderation/src/ModerationInformation.php

TranslatableInterface.php in core/lib/Drupal/Core/Entity/TranslatableInterface.php