ë instead of having to use \"e.
For more information on the inputenc-package see the file ``inputenc.dvi'' which
should be included in the LATEX-distribution.
Possible encodings (as mentioned in this dvi file) are: ascii, latin1, latin2, latin3, latin4, latin5, latin9, decmulti, cp850, cp852, cp437, cp437de, cp865, applemac, next, ansinew, cp1252, and cp1250. Some additional encodings in later versions are latin10, cp858, macce, and cp1257. In the newer LATEXversions it is also possible to use utf8. Support for that is included in the base system. Note that not all UTF-8 characters are included and an error will be given if a valid but not implemented character is encountered.
To use an encoding include \usepackage[latin1]{inputenc} in your LATEX-source file. The helpfile mentions that the encoding can also be selected in
the document with \inputencoding{latin1}.
Such a LATEX-file can be spellchecked with ispell -t -T latin1.
More information on latin1 can be found in the ISO-8859-1 National Character Set FAQ (http://www.cs.uu.nl/wais/html/na-dir/internationalization/iso-8859-1-charset.html).