First of all, I think that Gimp should be GIMP in these strings:
msgid "Compute a set of coefficient buffer for the Gimp cage tool"
msgid "Convert a set of coefficient buffer to a coordinate buffer for
the Gimp cage tool"
Second, I don't know what to do with the GimpCageConfig; is this
something that is supposed to be known by a normal user ? It should be
not translated ?
msgid "A GimpCageConfig object, that define the transformation"
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