It is related to Polish in that both are Slavic languages, even though Polish is a Lechitic West Slavic language rather than an East Slavic language.
As for German and Polish, they are only related any more than simply both being Indo-European languages in that the Germanic languages are possibly closer to the Slavic languages and the Baltic languages than to the rest of the Indo-European languages and that Polish has historically borrowed words from High West Germanic dialects.
Rolls, Russian is one of the East Slavic languages, along with Ukrainian, Belarusian, and the two different languages/dialect groups known as Rusyn.
Polish is the main representative of the Lechitic branch of the Western Slavic languages.
The Polish language is the most widely-spoken of the Slavic language subgroup of Lechiticlanguages which include Kashubian (the only surviving dialect of Pomeranian language) and the extinct Polabian language.
In the western and northern territories, resettled in large measure by Poles from the territories annexed by the Soviet Union, the older generation speaks a dialect of Polish characteristic of the former eastern provinces.
Kashubian or Cassubian (Kashubian: kaszëbsczi jãzëk, pòmòrsczi jãzëk, kaszëbskò-słowińskô mòwa) is one of the Lechiticlanguages, which are a group of Slavic languages.
It is assumed that it evolved from the language spoken by some tribes of Pomeranians called Kashubians, in the region of Pomerania on the southern coast of the Baltic Sea between the Vistula and Oder rivers.
also spelled Lechitic group of West Slavic languages composed of Polish, Kashubian and its archaic variant Slovincian, and the extinct Polabian language.
All these languages except Polish are sometimes classified as a Pomeranian subgroup.
The extinct Polabian language, which bordered the Sorbian dialects in eastern Germany, was spoken by the Slavic population of the Elbe River region until the 17th or 18th century; a dictionary and some phrases written in the language exist.
The Lechiticlanguages include three languages spoken in Central Europe, principally in Poland, and historically also in Brandenburg, Mecklenburg, and Hither Pomerania, in the north-eastern region of modern Germany.
The term Lechitic derives from the name of Lech, the legendary ancestor of the Lechitic peoples and founder of Poland.
This language group is a branch of the larger West Slavic language family.
And Sìopiewnie inaugurated the phase in Szymanowski’s music that scholars have labelled ‘lechitic’ — a term taken from linguistics, where it refers to the group of west Slavonic languages that includes Polish.
He used the Op 50 Mazurkas as a drawing board, an experimental template to explore his lechitic keyboard style: form, tonality, rhythm — all are exploited in the search for a new music language which would fuse the characteristic features of highland music with Szymanowski’s mature idiom.
The 20 Mazurkas, Op 50 (they were published in five sets between 1926 and 1931, each with four mazurkas apiece), were begun in parallel with Szymanowski’s orchestration of his magnum opus, the opera King Roger, in the first half of 1924.
Lechitic[?] group allegedly includes Poles, Pomeranians and Polabian Slavs
The Proto-Slavic (or Proto-Balto-Slavic) language branched off at some uncertain time in an unknown location from common Proto-Indo-European, becoming a separate Indo-European language: Proto-Slavic, a hypothetical (reconstructed) language whence Common Slavonic and the later individual Slavic languages emerged.
One can customarily divide the Slavs into the following subgroups: