Why is "lens" singular and "lenses" plural? Why isn't "lens" the plural of "len"?

@SW-User Yes, but it looks like the plural of "len", doesn't it?

@Crazychick nnn no. len isn’t a word. sorry.

@SW-User Isn't it? I thought there was a pop group called Len. Did they just make the word up just to give themselves a name no other group had already chosen?

@Crazychick it might be a proper noun, but it is not a defined word in a valid dictionary.

@SW-User So where did the band get the name from? I've just Googled them and there never was any member of the group called Len, so it can't be a proper noun in this case.

@Crazychick you’d have to ask the band.

@SW-User But they live in Canada. It's too far away. Lol :)

@Crazychick maybe they have a website or something where you can post a question.

@SW-User I'll have a look. But I still think a single lens in a pair of glasses should be called a len and the pair of them a pair of lens. It somehow sounds right. Lol :)

@Crazychick English is a Germanic language, based from Latin. this is why the English language seems difficult to most people when it comes to rules and regulations. if you’ve ever taken Latin, which i have, it would not sound correct to you as len.

@SW-User English is a Germanic language, based from Latin? Yet German is not based on Latin. That seems like a weird contradiction.

@Crazychick that’s because Germanic does not equate to German. lol...

@SW-User What's Germanic then, and why is it called Germanic if it doesn't relate to German? That's even more illogical than "lens" not being the plural of "len".

@Crazychick the definition is a bit more broad, with German falling within the definition, but certainly not limited to…

Germanic: relating to or denoting the branch of [b]the Indo-European language family [/b]that includes English, German, Dutch, Frisian, the Scandinavian languages, and Gothic.

@SW-User Those languages aren't based on Latin though. Germanic and Latin-based languages are totally different, there is no connection.

@Crazychick afraid you’re not the authority on these things. and these things are not mutually exclusive.

@SW-User You said earlier on that English is a Germanic language, based from Latin. I cannot see the connection between Germanic and Latin-based languages. They are totally different. What am I missing?

@Crazychick ‘tis both Germanic, and based in Latin, hence the confusion.

@SW-User Do you mean partly Germanic and partly based in Latin? If you meant that, why not phrase it like that? It's not so confusing that way.

@Crazychick well, i’m only beginning to realize your difficulty with basic understanding. i shall keep that in mind in future.

@SW-User I'm beginning to see what you meant now, but it was the way you phrased it. That can make a world of difference to whether people understand it or not.

@Crazychick it’s unfortunate my phrasing caused you difficulty. please do have a nice day.