For citation style/translations, it appears that this will depend on the citation style, e.g., see http://www.citethisforme.com/blog/2019/02/20/cite-a-a-foreign-language-source . Some citation styles will want the title in its primary language with an English translation all in the same citation, whereas other styles will not want a translated title.
OJS in general could benefit from great flexibility/options in citation format output. Some journals require a citation style (or variation of a citation style) for their published articles (normally something that is typical/expected for their field) that is not available as a citation output in the reading tools. This does not make sense for readers who use the tool. It would be ideal if a journal could select and arrange the metadata fields included in a citation format (along with the desired punctuation, spacing, and text styling). I’m sure that’s easier said than done!
Vanessa