Need to add row to grid but here the challenge is I have multiple languages available for each row so how to achieve it?

I have table by name abc which have columns id(pk),refId(FK),uniqueId,languageId,location

here language Id is : id for languages ex: english =1 , french=2, hindi=3 etc 

unique id is: if say for refId(fk) there are 5 location then unique id is 1,2,3,4,5 for language id 1, unique id is 1,2,3,4,5 for language id 2, unique id is 1,2,3,4,5 for language id 3 etc 

so here my requirement is based on selection of ref Id I want to add location using grid but here challenge is user can allow to add location in all available languages and need to maintain uniqueid's same.
one thing need to consider is unique Id should be the next number to existing unique id for that particular refId.

Please do help, am struggling to implement it.