Or that it just can't work with anything else?

English education in the Netherlands may not place a strong emphasis on the correct use of apostrophes and plural forms, as these are often considered minor details compared to other aspects of the language, such as vocabulary and grammar. In Dutch, apostrophes are not used for indicating possession or contractions, and plurals are formed by adding -en or -s without an apostrophe. This difference can lead to Dutch speakers incorrectly applying their native language rules when writing in English.

In most cases, Dutch plurals are formed by adding -en or -s to the end of the noun without an apostrophe, e.g., "auto's" (cars), "huizen" (houses), or "boeken" (books).

However, apostrophes are used in Dutch plural forms in specific cases:

- Abbreviations: "cd's" (CDs), "tv's" (TVs), "pk's" (horsepower)

- Letters: "a's en b's" (a's and b's), "x'en" (x's)

- Some loanwords: "pizza's" (pizzas), "taxi's" (taxis), "baby's" (babies)

In some cases, the apostrophe is used to avoid confusion or for readability, especially when the plural form might be misinterpreted, e.g., "foto's" (photos) instead of "fotos" which could be read as a different word.