It's very typical for Signed Languages to have multiple centers usually the schools for Deaf. Swiss German Sign Language for example has five centers for Bern,

It's very typical for Signed Languages to have multiple centers usually the schools for Deaf. Swiss German Sign Language for example has five centers for Bern, Basel, Zürich, Luzern and St. Gallen. People say today that Swiss German Sign Language has five dialects and this usually wows people, even the Alemannic Swiss who themselves have many variants in their Alemannic dialect. Ireland is special that they gender-segretated the Deaf children and the consequence is that women and men have different dialects.