Hello there!
Our semi-lit/lit+ boards do not have a specifically set literacy as such, because we recognise how differently everyone views it and want to maintain a welcoming environment for roleplayers who are still developing their skills. However they should in general be posting more than just a few sentences per post, and the writing should be of a decent standard (ie: no text talk, full sentences, etc). There is also a general expectation that semi-literate posts will contain more detail and varied/advanced vocabulary.
Ultimately it is the choice of the roleplay owner to define the quantity of writing expected from members of their roleplay. For example, a roleplay expecting a single small paragraph of under 10 sentences and a roleplay expecting 3+ paragraphs are both very welcome in our semi-lit board.
This topic outlines in more detail our guidelines for the literate boards.
The regular roleplay boards in contrast generally contain simpler roleplaying styles, anything from short and snappy one-line roleplaying to a few sentences per post, however roleplayers who wish to write more are welcome to do so in these boards too. This is why you might see some people posting what you might consider 'semi-lit' posts in the regular forums. There is no 'upper limit' as to what can be written in the regular boards so those who are able to write more are free do so while roleplaying with people of lower literacy in a more casual environment, as opposed to the literate boards where it is expected that all members of the roleplay would be writing more. Again, the roleplay owner has the right to ask their members to write a bit more than one line if they choose to in this board as well, but unlike the literate board, it is not essential for the RP owner to have a defined literacy standard.
If you feel your roleplay would be better suited in a different forum (either moving up or down in literacy) then you can report the topic at any time and ask for it to be moved by staff, so you don't need to worry that where you create your roleplay is where it has to stay if you think you chose the wrong forum initially.