Thread:Support/We should clear up our license policy/reply (6)

Is it? Why only "derivative works may also be licensed under the licenses of the respective Free and Open Source projects the translations have been or will be added to"? Shouldn't all translations be under the license used by the software they're embedded in before getting into its code? Translations are derivative works so they must follow the licence of the source text and this can be considered implicit, but is not very clear.