I found a couple of links to do with ASCII folding token filter, which may help
https://www.elastic.co/guide/en/elasticsearch/reference/1.7/analysis-asciifolding-tokenfilter.html
http://stackoverflow.com/questions/28584780/ignore-ascii-characters-on-elasticsearch
I found a couple of links to do with ASCII folding token filter, which may help
https:/ /www.elastic. co/guide/ en/elasticsearc h/reference/ 1.7/analysis- asciifolding- tokenfilter. html
http:// stackoverflow. com/questions/ 28584780/ ignore- ascii-character s-on-elasticsea rch