| Jan Baudouin de Courtenay |
1897: Jan Baudouin de Courtenay and Hans Conon von der Gabelentz become corresponding members of the Russian Academy of Sciences.
1949: The Public Health and Local Government Act of Northern Ireland forbids street signs in Irish.
1989: The first ever (according to the choir) concert sung in sign language is performed at the Gwyn Town Hall in West Glamorgan, Wales.
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