塞内卡语（自称Onödowága或Onötowáka）是塞内卡人的民族语。

塞内卡语有不同的书写方式，这里所用的是塞内卡双语教学计划采用的正写法。

塞内卡语有3个塞音： /t/、/k/和.mw-parser-output .IPA{font-family:"Charis SIL","Doulos SIL","Linux Libertine","Segoe UI","Lucida Sans Unicode","Code2000","Gentium","Gentium Alternative","TITUS Cyberbit Basic","Arial Unicode MS","IPAPANNEW","Chrysanthi Unicode","GentiumAlt","Bitstream Vera","Bitstream Cyberbit","Hiragino Kaku Gothic Pro","Lucida Grande",sans-serif;text-decoration:none!important}.mw-parser-output .IPA a:link,.mw-parser-output .IPA a:visited{text-decoration:none!important}/ʔ/。/t/和/k/在元音或近音前发(和) 音。