Different applications uses different accelerator markers such as KDE and Mozilla uses ampersand, GNOME used underscore and OpenOffice uses tilde. Usually in Asian languages where a keyboard is western (en_US), generally original English accelerator is being used. So for translating in Hindi as well,  original English accelerators are being be used. So we should follow this conventions. We generally put the accelerators at the end of translated strings in the parentheses with the respective accelerator marker.