"Doktorlar doğuya gidiyorlar." Translation: Doctors are going east.
Evet - Yes.
Doktorlar is already (plural) so: 'The doctors are going east' is correct.
If it were (singular) "The doctor is going East" - Doktor doğuya gidiyor. - Correct.
I feel very lonely & am answering these questions without any other human contact. Very nice to come across your comment & be able to answer it.
Çok sağ ol
Onlar doğuya gidiyorlar - They are going to the east.
Onlar doğuya gidiyor - They are going to the east.
Doğu - East + "-ya" suffix.
The -ya/ye suffix is wrongly asserted as the dative case ending (DCE)
DCE is just the vowels -a/e.