The LadSpls structure is an SPLS structure that specifies the state of the language auto-detection over a range of text. Some states that are possible in a generic SPLS are not allowed in a LadSpls structure.
spls (2 bytes): An SPLS structure. The spls.fExtend and spls.fTypo fields are not used and MUST be zero. The spls.splf field MUST be one of the following: