title: Less override variable just for one country (language)
body: <p>The context of my problem :
  I have a website multi-language ( 20 ), I use less css.
  All stylesheets are common, except one for every country called to the end.</p>
  
  <p>I have a file com.base.less which has a variable of font. 
  Every stylesheet calls this file to use the variables which it contains.</p>
  
  <p>My question, for a country I must change the font, thus to re-declare the variable only for this country. 
  How can I proceed?</p>
  
  <p>Because if I re-celare my variable in my file of country, that this being called to the end it isn't written again.</p>
  
  <p>I use lessPhp, and I see ModifyVars but I don't know if it's good method ?
  (when I test he doesn't work)</p>
  
  <p>Thank you</p>