Part of lp.translations.interfaces
| Class | LanguageNotFound | Raised when a a language does not exist in the database. |
| Interface | IPOTemplateSubset | A subset of POTemplate. |
| Interface | IPOTemplateSet | A set of PO templates. |
| Interface | IPOTemplateSharingSubset | A subset of sharing PO templates. |
| Interface | ITranslationTemplatesCollection | A `Collection` of `POTemplate`s. |