JFYI: the word “fuck” while being more or less acceptable in English when in other languages have a strict offensive meaning and you can’t use it. So in a courts it won’t be accepted.
The only one license that doesn’t have issues is 0BSD:
- It’s used by Google for Android part (Toybox) while the WTFPL is blocked.
- The BSD licenses are well known for corporate lawyers and they’ll be fine with it.
- It doesn’t mention the problematic Public Domain but it’s effectively it’s equivalent.
- It’s popular and used even more often WTFPL.
- It’s very short and doesn’t have many versions.
- It’s old and used since 2006
Just use the one the same license to avoid fragmentation and confusing.