sentences:  Today this spelling variation is obsolete.Additionally, several spelling mistakes arise from devoicing, such as "krfawy" instead of "krwawy", or allophonic processes, as in "ałtobus" instead of "autobus"("ł" is presently pronounced as a glide vowel, similar to the English "w", though until the end of World War II it used to be a velarised alveolar liquid, or so called "dark-l"; this is still audible in various Polish black and white films from that time, during which the English "belt" and Polish "bełt", meaning "crossbow bolt", would be pronounced all but identically).Most misspellings arise from true pronunciation, but some derive from hypercorrection, such as