Hey aspirant,
It's good to know that you are interested in Translation diploma courses.
After finishing the 10+2 level, students can pursue a diploma in Translation. A certificate of competency in any language from a recognised university is necessary for this course.

So, here is a list of colleges which offer the same  in Andhra Pradesh :-
1. University Of Hyderabad, Hyderabad
2. Sri Venkateswara University, Tirupati
3. Andhra University, Visakhapatnam
4. School of Distance Education, Andhra University, Visakhapatnam

You can go with any.
All the best.