Bollée (1977: 55) cites the following examples of the progressive marker with inchoative meaning, which were not (any more?) part of the grammar of the native speakers which we consulted:
Mon pe ankoler.
[1SG PROG angry]
'I am getting angry.'
Mon pe lafen.
[1SG PROG hunger/hungry]
'I am getting hungry.'
Source: Bollée 1977: 96