internationalization questions

(I just send this a second time, because I have the feeling, that
Google Groups don't send my first message)

Hello guys, there are three (open) questions about the
internationalization of GWT, I have:

1) Is it a (huge) performance issue, to use only "Messages" for
constant and parameterized text, where usually would use both
"Messages" and "Constants"?

2) Is there a way to specify the original text in the source code,
whose translations can then be specified somewhere? (e.g.
Translate("Hello") in the source code and than in a properties file
for e.g. spanish: Hello = ¡Hola!)

3) Do you know any translation-tools, which generate the properties
and interfaces for you?

Thanks in Advance!

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