hai friends, i have doubt anybody help me....

i want to submit visit visa for my parents through metrash2 app but they ask birth certificate for my father & my birth certificate for my mother application.. pblm means my birth certificate my mother and father name mentioned my native language so they are accept or not? and then for my father visa application they r asked birth certificate but i don't have birth certificate for my father.. what can i do pls give me suggestion.....