Astroguider is written in English, but you don't need to know English to read it. Every major browser can translate the entire site into your own language, for free, in a couple of clicks — no extra app, no sign-up.
Quick version: most browsers will simply ask you if you'd like to translate the page the moment you land on Astroguider, if it's not already in your language. If you see that pop-up, you can usually just tap or click "Translate" and you're done — the detailed steps below are only for when that doesn't happen automatically.
Nice to know: Firefox translates entirely on your own device rather than sending the page to a cloud service — a good option if you'd simply rather your browsing stayed local.
A quick honesty note: automatic translation is genuinely good today, but it isn't perfect — especially for specialised terms in astrology, numerology and esoteric traditions, some of which don't have a single agreed translation in every language. If something reads strangely, the English original is always the most accurate version.