Languages can be more or less challenging to learn depending on various factors such as linguistic similarities, shared vocabulary, and cultural familiarity. For English speakers, the difficulty of learning a language is often determined by its relation to English and the degree to which the two languages share grammar, syntax, and vocabulary.

Easier languages for English speakers to learn typically belong to the Germanic and Romance language families, as they share more in common with English. Some examples include:

Spanish
French
Italian
Portuguese
Dutch
Swedish
Norwegian
Danish
German (although it has more complex grammar, it's still relatively easier due to shared vocabulary)

Languages that are more difficult for English speakers to learn often have greater differences in grammar, syntax, vocabulary, and sometimes use different writing systems. Examples of more challenging languages include:

Mandarin Chinese (complex writing system and tonal language)
Arabic (different script, complex grammar, and various dialects)
Japanese (complex writing system and different grammar structure)
Korean (different grammar structure and writing system)
Russian (different script and complex grammar)
Finnish (non-Indo-European language with complex grammar)
Hungarian (non-Indo-European language with complex grammar)
Vietnamese (tonal language)
Thai (different script and tonal language)
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