Linguistic philosophers give primacy to human language as a basis for philosophy.
"The limits of my language mean the limits of my world" Wittgenstein, Tractatus, Proposition 5.6.
This notion can be used to support a Young Earth viewpoint in the following way.
Before the first humans, human concepts did not exist. Human concepts of time did not exist either. Geological time did not exist, since there were no geologists to think it. Nor did cosmological time exist before cosmologists existed.
By contrast, God thinks outside of human frameworks and doesn't need limited human notions like "geological time" to do His work. The existence of His cosmos does not depend on human notions of cosmology or of time.
Therefore, for humans, TIME itself dates from Adam; or, looked at scripturally, dates from Genesis 1:1: in the beginning..., the first words of the Bible. That's our starting-point. Our lineages start from there. Time has meaning for us from then on.
This makes human time YOUNG, especially compared to the "billions of years" assumed by cosmologists. The beginning of the ability to express in human language concepts such as PAST, NOW, FUTURE etc marks the beginning of real, meaningful, human time.
The concepts "old" or "young" have no real meaning when applied to periods before human language. We can talk about the Earth as "billions of years old" (and the concept may even be helpful in furthering our understanding of the Earth), but this has as little meaning as "the square root of minus 1" (which still has its uses in mathematics) or as "a unicorn's horn" (which has its mythological uses). The existence of a word for a thing - even for a useful thing - is no proof for the existence of that same thing.
The Earth therefore cannot be "older" than the age of human language in which the concept "old" first appeared. "Old" or "young" mean nothing without a human to express them. Nor do the words "God", "Earth" or any other word.
So phrases such as OLD or YOUNG EARTH only start to mean something when human speech first appears. The words that allow us to speak of the Earth and its age mark the beginning:
John 1:1 In the beginning was the WORD.
The Earth is therefore YOUNG, probably no older than the last Ice Age, since human speech began round about that time.
