"Pište černým nebo modrým perem."

Translation: Write with a black or blue pen.

[GreenlandHoubarz]

Is there any difference between "pero" and "propiska"? I thought "pero" was more like a fountain pen.

[VladaFu]

Propiska is a colloquial name for kuličkové pero = ballpoint pen. Pero is any kind of pen but sometimes can indeed designate a fountain pen specifically.

[GreenlandHoubarz]

Mockrát děkuji za vysvětlení :)

[Leo970566]

Is there any difference between "Write with a black or blue pen" and "Write with a black or a blue pen" for a possible Czech translation?

[VladaFu]

Well, you can try to distinguish "Pište černým nebo modrým perem." and "Pište černým perem nebo modrým perem.", but the difference is very small.

[Leo970566]

Then I kindly ask "Write with a black or a blue pen" to be added to the possible translations :)

[BoneheadBass]

Please report it, if you get this one "wrong" again. We can no longer update the list of accepted translations, so it may be a while before adding your suggestion will be considered.