== serious issues with this article == 

 This article has almost too many issues to fix.  
 #Confuses tone with pitch accent throughout.   
 #Probably because of this, misidentifies a number of languages as tonal which are not (Scottish Gaelic,Lithuanian,others which have been discussed).  
 #Lacks citations, quite egregious in a scientific article. 
 #Editorializes excessively ("However, the undermarking of tonality is just part of the inadequacy of all spelling systems","The tones of Lithuanian are believed to be especially authentic...", etc.) 
 #Makes unencyclopedic claims, like the rather pedagogical section "Pronouncing tonality"  
 #Much of what is found in this article actually belongs in Tone (linguistics), but much of what one would expect to find in an article entitled Tonal language, such as a list of Tonal language or a broad discussion of the synchronic and diachronic categories of tonal languages is absent or given short shrift. 

 I'll try to fix a lot of these, but don't have time now.