pfctdayelise is talking pure nonsense (as she often does in legal
issues at Commons). The sense of the policy is to allow small
exceptions from the "all must be free" doctrine. The exceptions must
be legal according the national law and according the US "fair use".
Each European country has exceptions similar to "fair use": e.g.
German "Zitatrecht". If
http://www.ivir.nl/dossier/implementatie_2001_29_EG/wetten/tsjechie.pdf
is the actual Czech Copyright Act article 31 is relevant allowing
"quotations" of works for teaching purposes. But I think the case is
that rights owners give permission for Wikipedia only (which isn't
allowed at Commons which only accepts works under free licenses). One
can then conclude a fortiori that these uses are also according the
WMF policy.
Please remember that whole WMF projects are dealing with unfree
content: Wikiquote has lots of quotations which are copyright
protected. These should be deleted before any Czech picture.
Klaus Graf