I want translate name of report when it's return in def 

def reload_data(self):
return { 

'name': 'Report Purchase by vendors', #<--- how to translate it ?

"type": "ir.actions.act_window",

"view_mode": "tree",

"res_model": 'report.purchase.general.vendors' ,

"context":{'start_date':start_date,'end_date':end_date}} ​

Help me, pls. Thank everyone :D