No, they are completely different languages. Albanian is an Indo-European language in a group of it own, while Polish belongs to Balto-Slavic group. In particular, Albanian is not a Slavic language.
Indo-European has 9 living branches and 3 extinct branches. The living branches are: Albanian Armenian Baltic Celtic Germanic Greek Indo-Iranian Italic Slavic
Shqip is the Albanian language spoken by more than 7.4 million people around the world. Spoken primarily through out Albania, Kosovo and other Balkan regions, Albanian is an Indo-European language.
No, Arabic is not and indo-european language.
There is no Proto-Indo-European language group. Proto-Indo-European, or PIE, is the hypothetical root language from which Indo-European languages today (and others that are extinct) descend.
Proto-Indo-European. (There is also a new theoretical language called Pre-proto-Indo-European).
No. Indo-Iranian Language
Yes. Persian is an Iranian language within the Indo-Iranian branch of the Indo-European languages
Welsh is an Indo-European language; a member of the Celtic subgroup.
Yes, Russian is an Indo-European language belonging to the Slavic family.
No, Chinese is not an Indo-European language. It belongs to the Sino-Tibetan language family, which is a completely separate language grouping from the Indo-European family that includes languages like English, Spanish, and Hindi.
Yes it is. Urdu belongs to the Indo-Aryan branch of Indo-European languages.