More powerful AI says:

No, not all lettuces are the same species, although many commonly consumed lettuces (e.g., iceberg, romaine, butterhead, oakleaf, and leaf lettuce) belong to the same species, Lactuca sativa.

However, some plants commonly called "lettuce" belong to different species or even genera. Examples include:

Lactuca sativa: The typical garden lettuce varieties (iceberg, romaine, butterhead, oakleaf, loose-leaf lettuces).

Lactuca serriola: Wild lettuce, an ancestor to cultivated lettuce.

Valerianella locusta: Corn salad or lamb's lettuce, commonly consumed as lettuce but from a different genus.

Cichorium endivia: Endive, sometimes called lettuce but technically not in the lettuce genus (Lactuca).

Eruca vesicaria (Arugula or rocket): Often mixed with lettuces but belongs to an entirely different genus and family.

In summary, while most common lettuces belong to a single species (Lactuca sativa), not everything commonly called lettuce or used similarly in salads is botanically the same species or even genus.

Unkraut in German. Doesn't deserve to be called a Kraut.

I love it, what language is that?

In Swedish the prefix for bad stuff is the same as the prefix for not or un-. So a monster is a not-animal and a weed is ungrass. Which is especially interesting to me because that same prefix (o) is for better versions of things in Japanese.

e: This got me thinking about "plant," and I realized it's literally the verb to plant. In Swedish it's a growth, or thing that grew. Japanese and Chinese: planted thing. Spanish is also the same as the verb. I feel kinda bad we mostly talk about them in terms of farming them rather than giving them a proper name. Like if they get sentient someday, plant will probably be considered a slur.

The French name for weed could be translated to "bad/wrong grass"

aggressive spread and resilience to remove

Many would argue that mint is an herb. But if you ever had your garden invaded by mint, you'll definitely classify them under weed.

Always plant mint in a pot. And if your neighbour has mint in their garden, you better have a 2m trench filled with concrete between their garden and yours.

Any kind of twig that's not a shrub?

In German it's "Unkraut" which could either be interpreted as "not herb", "abnormal herb" or "evil herb". Is the range similar in Spanish?

If you are happy with the plants being where they are then they aren't weeds. The main problem is companies that sell plant killing chemicals and services treat the word 'weed' as if it had a universal meaning.

I wish someone had warned me before No Mow May about brambles.

1 shoulder injury and a year later I need chainmail gloves and a fucking flamethrower. I fill my green bin with brambles, by the time it's picked up they've grown back.

The main root is under a shed. I don't know how to eliminate it.

what the hell is a bean field? also beans are great with corn they climb the stalks, also have squash, then boom you have the so called three sisters.