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Use a contextual filter and set to use a url position if not provided. Use the 1st argument (the language selection) and provide a default value if need be.
EDIT:
Something like this:
Use a contextual filter and set to use a url position if not provided. Use the 1st argument (the language selection) and provide a default value if need be.
Use a contextual filter and set to use a url position if not provided. Use the 1st argument (the language selection) and provide a default value if need be.
Use a contextual filter and set to use a url position if not provided. Use the 1st argument (the language selection) and provide a default value if need be.