Issue with Aggregations on language field

[dobariya]

Content.lang field does not give proper result when used in term aggregations having language zh-cn and zh-tw
I am using aggregations on content.lang filed as below

{
"aggs" : {
"tags" : {
"terms" : {
"field" : "content.lang"
}
}
}
}

the result is

"aggregations": {
"tags": {
"doc_count_error_upper_bound": 0,
"sum_other_doc_count": 5,
"buckets": [
{
"key": "zh",
"doc_count": 6
},
{
"key": "cn",
"doc_count": 4
},
{
"key": "en",
"doc_count": 4
},
{
"key": "ar",
"doc_count": 2
},
{
"key": "de",
"doc_count": 2
},
{
"key": "es",
"doc_count": 2
},
{
"key": "fr",
"doc_count": 2
},
{
"key": "ja",
"doc_count": 2
},
{
"key": "ko",
"doc_count": 2
},
{
"key": "no",
"doc_count": 2
}
]
}
}

I have document with zh-cn and zh-tw language.When using aggregations it splits the word from "-" and makes two different words..See above output zh=6 and cn=4.But actually this is a single language "zh-cn"

Is this a bug? or do i have to set up anything else to make a whole word

[jprante]

New release 1.4.4.2 contains a bug fix. Thanks for reporting.