don’t, won’t, it’s, can’t, there’s, …
do not, will not, it is, cannot, there is, …
In general, contractions (such as the examples above) should not be used when writing user-interface strings, for two main reasons:
- contractions are avoided in formal writing
- they make English text harder to understand for non-native readers (and although KDE has great translation teams , the original English string is used if no translation exists)
For further discussion on this issue, in general, see the following blog post: Don’t Use Contractions?