It's unclear what English strings "Y", "N" and "D" mean

[Andrej Znidarsic]

In translation template there are 3 strings named "Y", "N" and "D".

Without comments it's difficult to predict what they mean and therefore translating them correctly. Please add comments to those strings and describe what they mean.

[Pierre Slamich (pierre-slamich)]

Yes, No and ????

[Gabor Kelemen (kelemeng)]

And "Don't ask again". It's before the "D" string, this is the accelerator key. With .properties files it's also possible to add comments to the source, just use the

# This is the explanation of key with the translatable value
key=value

form.