22.214.171.124 Standardized Work – operator instructions and visual standards
The organization shall ensure that standardized work instructions are:
a) Communicated to and understood by the employees who are responsible for performing the work:
c) Presented in the language(s) understood by the personnel who are responsible to follow them:
d) Accessible for use at the designated work area(s).
In case when you have different nationalities, you can either choose to define official language of the company so all official documents are required to be written on this language but this wont resolve your problem with people who don't speak the language.
For people who do not speak the official language of the company, you can either translate the documents that they need to use and make the doc uments bilingual or try to make those document more pictorial and avoid writing text but present them with pictures. In any case you do not have to translate all QMS documents but only those that are used by employees who don't speak the official language.