[Libreoffice] Language configuration (spell check , ...)

[Hagar de l'Est]

Hi the list,

Is there any information available about the language configuration for spell check and thesaurus?

It seems the management is different from OOo (even 3.3). There is no more dic extensions, nor any dictionary.xcu of linguistic.xcu files.
Have installed LibO, I have fr and en but no thesaurus at all (and it works fine with OOo 3.3).

TIA.
Hagar