Why is English Tricky?

We will begin wih a box, and the plural is boxes;
but the plural of ox should be oxen, not oxes.
                                     Then one fowl is goose, but two are called geese;
                                     Yet the plural of moose should never be meese.
You may find a lone mouse or a whole lot of mice,
but the plural of house is houses, not hice.
                                     If the plural of man is always called men,
                                     why should not the plural of pan be called pen?
If cow in the plural may be cows or kine,
but the plural of vow is vows not vine.
                                     And I speak of a foot, and you show me your feet,
                                     but I give you a boot, would a pair be called a beet?
If one is a tooth, and whole set are teeth,
why should not the plural of booth be called beeth?
                                     If the singular is this, and the plural is these,
                                     should the plural of kiss be nicknamed kese?
Then one may be that and three may be hose,
yet the plural of hat, would never be hose;
                                    We speak of a brother and also of brethren,
                                    but though we say mother, we never say methren.
The masculine pronouns are he, his and him
but imagine the feminine she, shis and shim!
                                    So our dear English, I think you will all agree,
                                    Is the tricky language you ever did see.