From Muppet Wiki

The different names and voices of Elmo across the globe. In most countries, Elmo only appears in inserts, and is dubbed by local actors. However, Takalani Sesame, 5, Rue Sésame and the Japanese co-production have their own Elmo puppets and puppeteers, as trained by Kevin Clash. When initially introduced in Germany as a fairly minor character, Elmo was treated as a female monster, and re-named "Elma." This was changed in 2000.

Country/Show	Name	Performer	Picture
Denmark, Elmers Verden	Elmer	Troels Walther
France, The Adventures of Elmo in Grouchland	Elmo	Emmanuel Curtil
France, 5, Rue Sésame	Elmo	Christophe Albertini
Germany, Sesamstrasse (2000 onward)	Elmo	Sabine Falkenberg
Italy, Il Mondo di Elmo	Elmo	Davide Garbolino
Italy, Le avventure de Elmo in Brontolandia	Elmo	Fabrizio Vidale
Japan, Sesame Street (Japan)	Elmo	Kenta Matsumoto
Mexico, Plaza Sesamo	Elmo	Eduardo Garza
The Netherlands, Sesamstraat	Elmo	Hein Boele
Poland, Ulica Sezamkowa	Bodzio	Lucyna Malec
Poland, Świat Elmo	Elmo	Tomasz Bednarek
Spain, The Adventures of Elmo in Grouchland (Castilian and Catalan)	Elmo	Berta Cortés
South Africa, Takalani Sesame	Neno	Unknown