First we need to understand that Czech, Slovak, Slovenian (and other Slavic) languages were sometimes less and sometimes more prohibited from the public use, the policy varied on the kingdom within the Empire.

For example, after the 1848 revolution the successful Austrian war but failed Slovak uprising led to even stricter language policing in the historical 'Upper Hungary' province. The Pan-Slavic elite of Slovakia was either arrested, killed or were forced to give up their high positions in universities, or fled to teach in Austria. Most of the time such discrimination was solely linguistic. There was Germanization of Czech and Slovenian lands, while Magyarization of Croatian and Slovak lands. Magyarization seemed to be more destructive and aggressive than Germanization of the Czech lands, given the scope and the harshness of the events within the kingdom. More can be seen here.

This Magyarization meant the following: Either the Slovak was going to be educated SOLELY in Hungarian language, or he was a peasant, or a priest (which was the highest form of education you could get in our lands at that time). This also meant that the uneducated people couldn't rally behind the uprising which failed as the Austrian Emperor did not agree (only after the revolution) with the Slovak demands. This extensive discrimination (especially after the end of the revolution) of Czechs, Slovaks, Croats and Slovenes led them to abandon the idea of Austroslavism for good.

Usage of Slovak language/dialects was, in certain times (especially after the 1848 revolution), banned from universities and other public places. People could speak their own language only in their houses. Germanization was somewhat successful, as Czech language was rarely spoken in Prague so much so, that a Slovak poet Samuel Tomasik was shocked when he was there, and in a single evening wrote the 'Hej Slovaci' poem (which turned into Hey Slavs! later on).