Signalling available translations

Currently, my (hobby) website is all in English. I've had an offer from someone who is a fan of the target matter of the site to translate articles from the site into his own language. My plan is that a translated article will be available via two paths: a link from the English article, and via a separate page titled [website name] [in] [language] (e.g., for Spanish, "[website name] en Español"). The non-English pages will link back to the English originals. It's those links - article-to-translation - that I'm interested in, here: Should I use a text link, e.g., "Lea este artículo en español", or should I use a little national flag icon?