" As for the letter ů, as used in the Czech Republic, the story is a similar one to the Swedish. In the sixteenth century, the pronunciation of /uo/ changed to /uː/, prompting a need to reflect this in written Czech. Reformationists with close ties to Germany brought the Early New High German ů with them and used it in the influential translation of the Czech Bible kralická. (The closely related Slovakian language writes the same sound with an ô after Martin Hattala’s 1852 grammar.) "