bulgarisch
Bulgarian
Relating to the country Bulgaria, its inhabitants, its culture, or its language.
Wir haben in einem bulgarischen Restaurant zu Abend gegessen.
We had dinner at a Bulgarian restaurant.

Bulgarian
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Bulgarian
Relating to the country Bulgaria, its inhabitants, its culture, or its language.
Wir haben in einem bulgarischen Restaurant zu Abend gegessen.
We had dinner at a Bulgarian restaurant.

Adjectives for countries or regions in German are often formed with the ending '-isch'. So the country 'Bulgarien' (Bulgaria) becomes the adjective 'bulgarisch' (Bulgarian).
Die bulgarische Schwarzmeerküste ist ein beliebtes Urlaubsziel.
The Bulgarian Black Sea coast is a popular vacation destination.
Adjectives derived from country names are written in lowercase in German. However, if you mean the language as a noun, you write it with a capital letter.
Er lernt die bulgarische Sprache.
He is learning the Bulgarian language.
The adjective 'bulgarisch' (Bulgarian) is often used to describe things that are typical of the country, such as 'die bulgarische Küche' (Bulgarian cuisine), 'bulgarische Musik' (Bulgarian music), or 'bulgarische Traditionen' (Bulgarian traditions).
Ich mag die bulgarische Küche sehr, besonders den Schopska-Salat.
I really like Bulgarian cuisine, especially Shopska salad.
Bulgarian
'bulgarisch' and 'der Bulgare' both refer to Bulgaria. The difference is in the part of speech and in how they are used. 'bulgarisch' is an adjective and describes, for example, a language, food, a culture, or a person. 'der Bulgare' is a noun and means a man from Bulgaria or with Bulgarian citizenship. Learners may confuse the words because they look very similar. Remember: 'bulgarisch' describes something; 'der Bulgare' is a person.

Meine Nachbarin kocht heute ein bulgarisches Gericht.
My neighbor is cooking a Bulgarian dish today.
In unserer Nachbarschaft wohnt ein Bulgare, der sehr gut Deutsch spricht.
A Bulgarian man lives in our neighborhood who speaks German very well.