<s>
Language	O
Tool	O
is	O
a	O
free	B-License
and	I-License
open	I-License
source	I-License
grammar	B-Application
,	O
style	O
,	O
and	O
spell	B-Application
checker	I-Application
,	O
and	O
all	O
its	O
features	O
are	O
available	O
for	O
download	O
.	O
</s>
<s>
Language	O
Tool	O
website	O
connects	O
to	O
a	O
proprietary	B-Application
sister	O
project	O
Language	O
Tool	O
Plus	O
,	O
which	O
provides	O
improved	O
error	O
detection	O
for	O
English	O
and	O
German	O
,	O
as	O
well	O
as	O
easier	O
revision	O
of	O
longer	O
texts	O
,	O
following	O
the	O
open-core	O
model	O
.	O
</s>
<s>
It	O
was	O
started	O
by	O
Daniel	O
Naber	O
for	O
his	O
diploma	O
thesis	O
in	O
2003	O
(	O
then	O
written	O
in	O
Python	B-Language
)	O
.	O
</s>
<s>
The	O
core	O
app	O
itself	O
is	O
free	B-License
and	I-License
open-source	I-License
and	O
can	O
be	O
downloaded	O
for	O
offline	O
use	O
.	O
</s>
<s>
Some	O
languages	O
use	O
'	O
n-gram	B-Language
'	O
data	O
,	O
which	O
is	O
massive	O
and	O
requires	O
considerable	O
processing	O
power	O
and	O
I/O	O
speed	O
,	O
for	O
some	O
extra	O
detections	O
.	O
</s>
<s>
As	O
such	O
,	O
Language	O
Tool	O
is	O
also	O
offered	O
as	O
a	O
web	O
service	O
that	O
does	O
the	O
processing	O
of	O
'	O
n-grams	B-Language
'	O
data	O
on	O
the	O
server-side	O
.	O
</s>
<s>
Language	O
Tool	O
Plus	O
also	O
uses	O
n-grams	B-Language
as	O
part	O
of	O
its	O
freemium	O
business	O
model	O
.	O
</s>
<s>
Language	O
Tool	O
web	O
service	O
can	O
be	O
used	O
via	O
a	O
web	B-Application
interface	I-Application
in	O
a	O
web	B-Application
browser	I-Application
,	O
or	O
via	O
a	O
specialized	O
client-side	B-Operating_System
plugins	B-Application
for	O
Microsoft	B-Application
Office	I-Application
,	O
LibreOffice	B-Application
,	O
Apache	B-Application
OpenOffice	I-Application
,	O
Vim	B-Application
,	O
Emacs	B-Application
,	O
Firefox	B-Application
,	O
Thunderbird	B-Application
,	O
and	O
Google	B-Application
Chrome	I-Application
.	O
</s>
<s>
Its	O
web	B-Application
app	I-Application
client	O
can	O
also	O
be	O
integrated	O
on	O
websites	O
.	O
</s>
<s>
Error	O
detection	O
succeeds	O
with	O
a	O
variety	O
of	O
rules	O
based	O
on	O
XML	O
or	O
written	O
in	O
Java	B-Language
.	O
</s>
<s>
More	O
recent	O
developments	O
rely	O
on	O
large	O
n-gram	B-Language
libraries	O
that	O
offer	O
suggestions	O
for	O
improving	O
misspellings	O
with	O
the	O
help	O
of	O
artificial	O
neural	O
networks	O
.	O
</s>
