我在文件中有以下行（注意开头的选项卡）：
$q = "select pl.id, pl.pltag tag, tf.nome família, tg.nome Gênero, ts.nome espécie, l.nome localidade
当我尝试编辑它时，假设将 Gênero 替换为 gênero，我将光标向上移动到“G”，将“插入”更改为“替换”（再次按插入键），然后在其上键入“g”。看起来它有效，但是当我退出并保存时，我发现该文件现在有：
tg.nomeGgênero
看起来第一个选项卡让 Vim 感到困惑？或者葡萄牙语中使用的变音符号（Postgresql 接受）？我在 Ubuntu Desktop 14.04 中使用终端，通过 ssh 连接到另一台装有 Ubuntu Server 14.04 的计算机，我正在其中编辑文件。
尽管 Vim 没有提及任何有关语言环境的信息，但 psql 却说了以下内容：
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = "en_US:en",
LC_ALL = (unset),
LC_PAPER = "pt_BR.UTF-8",
LC_ADDRESS = "pt_BR.UTF-8",
LC_MONETARY = "pt_BR.UTF-8",
LC_NUMERIC = "pt_BR.UTF-8",
LC_TELEPHONE = "pt_BR.UTF-8",
LC_IDENTIFICATION = "pt_BR.UTF-8",
LC_MEASUREMENT = "pt_BR.UTF-8",
LC_TIME = "pt_BR.UTF-8",
LC_NAME = "pt_BR.UTF-8",
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
也许LC_ALL = (unset)是问题的根源？
stty -a根据评论中的要求，输出：
（我的机器）
speed 38400 baud; rows 24; columns 80; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = M-^?; eol2 = M-^?;
swtch = M-^?; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R; werase = ^W;
lnext = ^V; flush = ^O; min = 1; time = 0;
-parenb -parodd cs8 hupcl -cstopb cread -clocal -crtscts
-ignbrk brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon -ixoff
-iuclc ixany imaxbel iutf8
opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt
echoctl echoke
（服务器）
speed 38400 baud; rows 24; columns 80; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = M-^?; eol2 = M-^?;
swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R; werase = ^W;
lnext = ^V; flush = ^O; min = 1; time = 0;
-parenb -parodd cs8 -hupcl -cstopb cread -clocal -crtscts
-ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon -ixoff
-iuclc ixany imaxbel -iutf8
opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt
echoctl echoke