Simplify the following text for a Grade 13 native English-speaking person.
Original: Founded in 1979 by Chrissie Maher , the company positions itself as a leader in plain-language advocacy , working to persuade organizations in the UK and abroad to communicate with the public in plain language .
Simplified: Founded in 1979 by Chrissie Maher , the company positions itself as a leader in plain language advocacy , working to persuade organizations in the UK and abroad to communicate with the public in plain language .