Feminist language planning is when we try to change the words and language we use so that they don't make boys and girls or men and women feel any different or less important.
It's like when we have to share toys with friends, we should also share language so that everyone feels good about themselves. Girls and boys are equal and we need to use words that don't make girls or boys feel left out, or make them think that one is better than the other. It's important to be respectful and kind with the words we use, so that everyone feels included and valued.
For example, instead of using the word "he" to refer to a person, we may use other gender-neutral words like "they" or "them". Using pronouns like these doesn't make any difference in the meaning of the sentence, but it makes it more inclusive and respectful towards everyone.
In summary, feminist language planning means using words and language that treat girls and boys or men and women equally, so that everyone feels respected and included.