Uber Technologies Inc. is suing London s transport regulator in the latest skirmish over rules that may harm the controversial company s business.Uber will ask London judges to decide the legality of rules that require drivers from non-English speaking countries to pass a language exam, the company said in a statement.

The measures also force Uber to notify Transport for London of any changes made to its mobile-phone app.

This legal action is very much a last resort," Tom Elvidge, Uber London s general manager, said in the statement.

"We re particularly disappointed that, after a lengthy consultation process with Transport for London, the goalposts have moved at the last minute and new rules are now being introduced that will be bad for both drivers and tech companies.

San Francisco-based Uber has fought with regulators around the globe over the technology that traditional taxi companies say threatens their existence.

In London, Uber won a suit against TfL over the use of its app as a taxi meter and is still waiting for a ruling in an employment dispute with drivers.TfL, which oversees London s buses, subways and cycle paths as well as private-hire cars, said that the new rules were designed to boost safety.

The text above is a summary, you can read full article here.