There are no plans for to paint road markings in Manx in new 20mph zones.
Douglas Central MHK Chris Thomas raised the issue with Infrastructure Minister Michelle Haywood in the House of Keys this week.
Dr Haywood said Manx language signage would go against her department's policies.
However Mr Thomas - who's chair of Culture Vannin - explained his ideas:
Deadline looms for by-election nominations
Biker in UK hospital after Mountain crash
Trial event closes roads in Peel and Ramsey
Castletown police station could be yours... for £250,000
Brewery advertising for operator for landmark Laxey pub
Hospice cafe reopens next week after refurb
Another one bites the gust - as Ramsey rocks cancelled
Mountain Road closed again after crash