Northern Borderlands dialect
Northern Borderlands dialect is a dialect of Polish language, spoken by the Polish minorities in Lithuania and in northwestern Belarus. Phonology 
The Northern Borderlands dialect retains the same vowel system as standard Polish, however there is often vowel reduction in unstressed syllables. Most of the major differences in the realization of consonants. See Polish phonology for more information on allophones. Standard Polish /w/, spelled <ł>, is pronounced /ɫ/, and standard /l/ is palatalized, yielding /lʲ/, like in the Southern Borderlands dialect. The standard Polish palatal sibilants and affricates, /ɕ/, /ʑ/, t͡ɕ/, and /d͡ʑ/ (spelled ,<ś>, <ź>, <ć>, and <dź> respectively) are pronounced /sʲ/, /zʲ/, /t͡sʲ/, and /d͡zʲ/. The phoneme charts are as follows:

In media
This accent can be heard much in Lithuania. TVP has a station in Vilnius, and the podcast TakiTalk features many speakers with this accent. Notes

References

Bibliography
 

Polish dialects
Languages of Lithuania
Languages of Belarus