이야기하다, 말하다 and 대화하다 (to converse) all overlap somewhat in meaning in the area of talking or conversing. They are also all examples of verbal expressions, quite common in Korean (and Japanese), that are actually made from nouns + the verb to do/make 하다 (J する). So the various meanings of the nouns are the key.
이야기 (sometimes pronounced and written 얘기) means story, tale, rumor, hearsay, as well as talk or conversation. Note the similar connection in English between 'tale' and 'tell.' Compounds include 이야기책 storybook, 이야기꾼 storyteller, 이야깃거리 topic / subject.
말 and the more elevated or honorific form 말씀 mean words, speech, or even language. So another way of saying 한국어 is 한국말 (pronounced hangungmal due to the assimilation of the k before m).
대화 means dialog, conversation, chat, or talk and is originally formed from the two hanja (Chinese characters) 對話, opposite / across + speech / talk. The Naver Dictionary (relied on heavily above as well to supplement some now very sketchy prior knowledge) gives the compound 대화창 chat window.
When you say "a little" that is put forth in a positive light, while "little" gives a negative tone, such as "not much". "speak" and "talk" are not always interchangeable. https://www.merriam-webster.com/dictionary/speak https://www.merriam-webster.com/dictionary/talk
"speak" focuses on the process of talking or is used when one makes a speech or talks to someone in a one way sort of manner. "talk" is just a general back and forth exchange of ideas and focuses on communication by word of mouth. "talk" is used for general conversation. So, if you say "The children speak a little." I think that they are still learning how to talk. If you say "The children talk a little." I think that they had a short conversation.
The hints do show both "talk" and "speak", did you try "speak"?
I really wish the verbs were taught BY THEMSELVES instead of in a sentence. It's annoying to have to look for the meaning of the word by hovering over it, makes me feel dumb AF. Also, the format they appear in the sentence is not the 'original' one. It's always modified in order to be in sync with the noun and such.
It's like asking me to swim without telling me WHAT swimming is. That needs to be fixed and broken-down in order to be comprehensible for everyone.
From what i know, in order for little to be applied to the noun you would have to use the word little along with the post position 은/는 in front of the word for children. However, in this case, the word 조금 cannot be used to describe people. It is used to describe 'a little amount of something'.
I think you're attributing the term "little" to its English connotations. In the translation it means "a little" as in "a piece of". This is different from "little" as in "small". Keeping that in mind, it would seem less reasonable for us to translate the sentence to "A bit of children speak", it would be weird. Furthermore, children has a subject marker and although I haven't gotten to adjectives yet in Duolingo and how that sentence structure operates, there will probably some indication as to when the subject is being modified, as would be the case if the word "little" was to modify children rather than speak.
This should really have several answers. The children speak a little. The children speak some. They are both right. Having such a strict answer format really affects the system. Also anyway to add a speaking check part to all this? Its a great apo, I love it but would love if it had a speaking check part to make sure you are pronuncing correctly.
Late response but: Typically it denotes the subject of the sentence.
~ 이 comes after a consonant (which in this case would be 들)
~ 가 comes after a vowel. So for example if it was just 아이, it'd be 아이가
This was covered in Basics 1 if you need the refresher still. https://www.duolingo.com/skill/ko/basics-1
Talk a little is a positive thing, maybe I did not expect them to talk much or at all and here they did talk a little.
Tall little is not much, so it appears as a negative thing.
Talk less is not as much as before, so there is a comparison to a time when they talked more than this time.
People speak a language and talk to each other. You speak in front of a crowd which is the same as giving a speech. You speak to someone about something, which sounds a bit more serious than talking to someone about something. You talk for hours on end. You talk with your friends. You can even teach your dog to speak, but that dog will never talk unless it is in a children’s story or cartoon where animals do things like humans. Your child may speak for the very first time, but it will take longer for him to talk with you. So speaking is concerned with the physical ability to form words or create speech and is also used when you plan to speak to someone about a serious situation. Talk is more casual and is used for the exchange of ideas and feelings between people.