A "log" term is usually referred to a natural logarithm, and the differential expression is usually calculated as a binary logarithm.
Based on 11,472,063 documents collected by the Springer Exemplar, authors' tend to use more logFC abbreviation than log2FC, even today (Fig. 1). One reason for that is the use of "logFC" term by the authors in the manuals and output files generated by the most popular tools for the differential expression analysis.
To overcome this problem, I suggest using a new term, "loget", that will always refer to the same unit.
A “loget” is calculated as follows:
loget = log2 ((level in test) / (level in reference) )
Moreover, the "loget" term is easier to pronounce than the "logarithm two of fold change". Instead of always referring to the "log two fold change" or "binary logarithm of fold change", one could simply use the "loget" word. For example, instead of saying "There were 200 up-regulated genes with the log two-fold change range from 2 to 5" one could say "There were 200 up-regulated genes with the loget range from 2 to 5".