europäisch
European
Relates to the continent of Europe, its countries, peoples, or culture.
Paris und Rom sind zwei große europäische Hauptstädte.
Paris and Rome are two major European capitals.

European
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European
Relates to the continent of Europe, its countries, peoples, or culture.
Paris und Rom sind zwei große europäische Hauptstädte.
Paris and Rome are two major European capitals.

The adjective 'europäisch' (European) is derived from the noun 'Europa' (Europe). The ending '-isch' is a typical ending used to form adjectives from geographical names.
Die asiatische und die europäische Kultur haben viele Unterschiede.
Asian and European culture have many differences.
In German, adjectives derived from continents or countries are written in lowercase, except at the beginning of a sentence. So it is 'ein europäisches Land' (a European country), not 'ein Europäisches Land'.
Er spricht mehrere europäische Sprachen fließend.
He speaks several European languages fluently.
Whether the continent of Europe or the European Union (EU) is meant can be recognized from context. If it is about politics, law, or economics, the EU is often meant. If it is about culture, geography, or history, the continent is usually meant.
Die europäische Gesetzgebung beeinflusst viele Bereiche.
European legislation affects many areas.
national
'europäisch' and 'national' can both refer to politics, rules, culture, or areas of responsibility. The difference is the level: 'europäisch' means Europe or the European Union, while 'national' means an individual country or state. They can be confused when talking about laws, authorities, or interests. In that case, the important point is: if something applies to Europe or the EU, it is 'europäisch'; if it concerns only one country, it is 'national'.

Im Unterricht sprechen wir heute über europäische Regeln zum Datenschutz.
In class today, we are talking about European rules on data protection.
Bitte bringen Sie Ihren nationalen Ausweis zur Behörde mit.
Please bring your national ID card with you to the government office.